| Paropsonemid Temporal range: Chengjiang–Devonian[1] |
|
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Stem-group: | Ambulacraria |
| clade: | †Cambroernida |
| Family: | †Eldoniidae |
| clade: | †Paropsonemida |
The paropsonemids are problematic fossils known from the Ordovician to Devonian periods, which may be related to the Cambrian eldoniids.[2] They are typified by the Chengjiang genus Paropsonema.